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AI Daily Brief — 22 November 2025

Saturday was the calmest day in 10 days. Simon Willison published deep-dive on Ai2 Olmo 3 — released Thu Nov 20. Highlights: ships not just open weights but the full Dolma 3 (~9.3T-token) corpus, training code, hyperparameters, intermediate checkpoints — most transparent frontier-class open model of 2025. Olmo 3-Think (32B) positioned as best fully open reasoning model, competitive with Qwen + Llama. Tencent HunyuanVideo-1.5 (released Fri Nov 21) dominated weekend HF + GitHub traffic — 8.3B DiT + 3D causal VAE, runs on single consumer GPU with 14GB VRAM, SSTA 1.87× FlashAttention-3 speedup at 720p/10s, full weights + code + SSTA kernels open. Anthropic publicly quiet before Mon’s Claude Opus 4.5 reveal — model id claude-opus-4-5-20251101 pre-baked. Lead-up: Nov 18 Anthropic + Microsoft + NVIDIA three-way ($30B Azure + up to 1 GW Grace Blackwell + Vera Rubin; Microsoft up to $5B + NVIDIA up to $10B into Anthropic at ~$350B post-money — nearly 2× September Series F at $183B). NVIDIA Nemotron Parse vision-document model continued trending alongside Olmo 3 + HunyuanVideo-1.5. HF trending papers dominated by analyses of Gemini 3 + GPT-5.1-Codex-Max + Nano Banana Pro + Olmo 3.

Top stories

  • Willison Olmo 3 deep-dive. Full Dolma 3 (~9.3T tokens), training code, hyperparameters, intermediate checkpoints public. Most transparent frontier-class open model of 2025. Olmo 3-Think (32B) competitive with Qwen + Llama. via Simon Willison
  • HunyuanVideo-1.5 dominates weekend HF + GitHub. 8.3B DiT + 3D causal VAE, single consumer GPU 14GB VRAM, SSTA 1.87× FlashAttention-3 at 720p/10s, full weights + code + SSTA kernels open. Open counterweight to Sora + Veo. via GitHub
  • Anthropic publicly quiet before Opus 4.5 reveal. Mon Nov 24 (model id claude-opus-4-5-20251101). Lead-up: Nov 18 Anthropic + Microsoft + NVIDIA three-way at ~$350B post-money. via Anthropic
  • HF trending papers: Gemini 3 + GPT-5.1-Codex-Max + Nano Banana Pro + Olmo 3 analyses. Few new arXiv submissions broke through weekend as field digested back-to-back frontier launches. via Hugging Face
  • NVIDIA Nemotron Parse continues HF uptake. Vision-document model beyond traditional OCR; trending alongside Olmo 3 + HunyuanVideo-1.5. via Hugging Face

Who shipped

Nobody Saturday. OpenAI, Anthropic, Google, Meta, xAI, DeepSeek, Alibaba all dark. Olmo 3 + HunyuanVideo-1.5 from prior days continue community uptake.

Open-source pulse

Open-source community continued downloading and benchmarking Olmo 3 (allenai/Olmo-3-1125-32B on HF) and HunyuanVideo-1.5 — derivative quantizations and ComfyUI workflows appearing through weekend.

Money, infra & hardware

No new rounds. Anthropic at $350B post-money continues to anchor frontier-lab capital narrative ahead of Opus 4.5.

Quiet corners

Saturday was calm-before-the-storm of Anthropic’s biggest model launch since Sonnet 4.5 (Sep 29).

By the numbers

  • 0 — frontier-lab launches Saturday
  • 9.3T / 6× — Olmo 3 Dolma 3 corpus / training-token efficiency vs Qwen 3-32B-Thinking
  • 14GB / 1.87× — HunyuanVideo-1.5 consumer VRAM / SSTA speedup
  • ~$350B / 2× — Anthropic post-money / Sep Series F step-up
  • Most-mentioned company: Ai2
  • Quietest segment: everything except Olmo + Hunyuan

Compiled by AI Feed’s editor from verified web sources for 22 November 2025.